Gearing.



H. M. NORRIS. GEARING.

APPLICATION FILED DBG. 1e, 1910.

1,024,220. Patented pr. 23, 1912.

f a/ 3 9% 25`l I 2 HENRY M. NORRIS, OF CINCINNATI, OHIO,

1l NITRD STATE@ ASKSIGNOR TO THE CINCINNATI BICKFORD TOOL CO., OFCINCINNATI, OHIO, A CORPORATION OF OHIO.

emmer.

Specification of Letters Patent.

Patented Apr. 223, 1912.

` Application led December 16, 1910. Serial No. 597,715.

i T o all whom it mag/concern:

. Similar Be it known that I, HENRY M. NoRRIs, a citizen of the UnitedStates, residing at Cincinnati, Ohio, have invented a new and usefulImprovement' in Gearing, of which the following is a specification.

My invention relates to gearing adapted to the use of radial drills orfor other suitable purposes and the objects of my improvements are toprovide means for chang.- ing the speed of a driven shaft from theconstant speed of a driving shaft; to provide means for maintaining aminimum speed of the driven shaft as a basis from which the increasedspeeds thereof may be graduated instead of starting from zero for eachdifferent speed change; and to provide simple and Vdurable constructionand assemblage of the different members for securing facility ofoperation and. efliciency of action. These objects are attained in thefollowing described manner, as illustrated in the accompanying drawings,in which Figure 1 is a longitudinal vertical section of gearingembodying my unprovements; Fig. 2 a transverse section on the line a-aof Fig. 1 Fig. 3 a plan with parts in section; Fig. 4 a longitudinalvertical section showing the detent pin in the yoke collar; Fig. 5 aplan of the guide slots for the operating lever; Fig. 6 an invertedvplan showing the sliding linkconnections with the yoke collars, andFig. 7 the silent pawl and ratchet for the slow speed gear.

In the drawings 1 represents-'the casing, 2 the 4driving shaft and 3 thedriven shaft both journaled therein. Different sized gears 4, 5, 6, and7 are secured on the driven shaft, and corresponding gears 8, 9, 11 and12 adapted to be detach'ablyv engaged therewith are secured together inpairs and splined on the drivin shaft.

Oppositely dispose studs 13 formed with concave seats 14 are secured inthe casing parallel with the driving shaft. Similar sleeves 15 slidinglymounted on the corresponding studs are each providedwith a springactuated detent pin .16Y adapted to automatically and yieldingly engagewiththe ,seats 14. Said sleeves are each also formed with a laterallyprojecting yoke arm 17 in movable enga ement with an annular groove inthe hubs o the respective gears 8 and 11 of each air of gears on thedriving shaft.

links 18 each formed with a central y notch 19 and an open slot 21 inone end are i secured at the other end to the correspondl ing sleeves15; Cap screws 22 serve to slidg ably engage the slotted end of saidlinks to i the respective opposite sleeves.

i A hand lever 23 secured at one end to j the casing by means of auniversal joint 24 i and adapted to engage with the notch 19 in eitherof said links is extended through the H shaped vslot 25 formed throughthe top of the casing.

A ratchet wheel 26 secured on the driven shaft is formed with a counterbore 27 andA with an extended hub 28 whereon the large gear 29 isloosely mounted and in continuous engagement with small gear 31 securedon the driving shaft.V A split ring y32 in frictional engagement withthe driven shaft is located within the counter bore 27 of the ratchetWheel. A pawl 33 pivotally secured ,to the loose wit-'h the teeth of theratchet wheel 26 is provided with a lug 34 which terminates within theslot or split 35 in the ring 32.

In operation, the pawl and ratchet wheel and gear connections with thedriving shaft serve to prevent the decrease in speed of the driven shaftbelow a predetermined amount and also to permit its speed to beaccelerated as desired. The engagement of the hand lever with the notchin either of the links permits it to be moved in the correspondinglongitudinal portion of the l-l shaped slot for alternately engaging thecorresponding gears 8 and 9 or 11 and 12 with the respective gears 4 and5 or 6 and 7 whereby four graduations of accelerated speed may beimparted to the driven shaft. The automatic engagement of the detentpins with the seats in the studs serve to. yieldingly maintain thesleeves with the sliding gears in predetermined adjusted po- 'sitions.

Having fully described my improvement, what I claim as' my invention anddesire to secure by Letters Patent of the United States is 1. A gearingcomprising, a shaft, gears splined thereon,oppositely disposed studsparallell with the shaft, sleeves slidably mounted thereon'and formedwith arms engaging with vthe respective gears, parallel links eachformed with a central notch and secured to the respective sleeves, alever for engaging with the notch in either link for gear 29 and adaptedto engagey spective links for the respective gears, parallel links eachformed with a cent-ral notch and secured to the respective sleeves, anda lever -ulcrumed at a xed point and movable in the slots and laterallythrough the passage for alternately engaging with the notch in thereshfting the sleeves with the gears on the shaft.

I H. M. NORRIS. Witnesses: HENRY G. FRECH, R. S. CARR.

